Method and apparatus for performing perspective transformation

An apparatus for perspective transforming a plurality of objects in a three-dimensional space into a two-dimensional space, each object having a plurality of vertexes, the apparatus comprising:

• a processing unit operable to determine whether the plurality of vertexes for each of the objects are localized within the three-dimensional space;
• and
• a graphics unit operable to perform (i) a first perspective transformation process on the respective plurality of vertexes of the objects when the plurality of vertexes for each of the objects are not localized within the three-dimensional space, and (ii) a second perspective transformation process on the respective plurality of vertexes of the objects when the plurality of vertexes for each of the objects are localized within the three-dimensional space,
• wherein the second perspective transformation process requires less calculating power than the first perspective transformation process.

An entertainment system, comprising:

• a controller for receiving input commands from a user;
• a processing unit operable to receive the input commands from the controller;
• and
• a graphics unit for perspective transforming a plurality of objects in a three-dimensional space into a two-dimensional space in accordance with the input commands received from the processing unit, each object having a plurality of vertexes, and the graphics unit being operable to (i) determine whether the plurality of vertexes for each of the objects are localized within the three-dimensional space, (ii) perform a first perspective transformation process on the respective plurality of vertexes of the objects when the plurality of vertexes for each of the objects are not localized within the three-dimensional space, and (iii) perform a second perspective transformation process on the respective plurality of vertexes of the objects when the plurality of vertexes for each of the objects are localized within the three-dimensional space,
• wherein the second perspective transformation process requires less calculating power than the first perspective transformation process.